microscope/cells. i. microscope a. parts 1. eyepiece – part you look through; 10x 2. coarse adj....
TRANSCRIPT
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MICROSCOPE/CELLS
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I. Microscope A. Parts
1. Eyepiece – part you look through; 10x
2. Coarse Adj. – focuses; moves stage up & down
3. Fine Adj. – focuses clearly
4. arm – supports lenses
5. base – supports microscope
6. stage – supports slide
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7. stage clips – holds slide in place
8. low power – 10x (x 10) = 100x
9. high power – 40x (x 10) = 400x
10. diaphragm – controls amt. entering lt.
11. light source – sends light thru slide
B. Care – use 2 hands, set scope away from edge, start on low power using only c.a. 1st & then f.a., then high power (f.a. only), keep clean, turn off light
C. Calc. Mag. – eyepiece x power
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How to Use a Microscope – 1:11
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II. Characteristics of Living Things
A. Cells
B. Organized
C. Use energy (cell respiration) for growth & Maintenance
D. Respond to Stimuli
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E. Growth – cells enlarge & divide
F. Reproduce – asexual (1 parent 2 identical offspring) or sexual (2 parents 1 different offspring
G. Adapt – adjust to environment
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III. Cells: cytology – study of cells
A. History
1. Hooke – coined the term
“cell”
2. Schleiden & Schwann – cell theory: all living things, except for viruses, are made of cells
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B. Types
1. Prokaryotic – w/o distinct cell parts; ex. Bacteria
2. Eukaryotic – w/ distinct cell parts; ex. Plants & animals
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C. Structures
Parts visible w/light microscope
1. Cell membrane – “semi-permeable” – lets some things in & out; B
2. Cytoplasm – cell fluid; B
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3. Nucleus – control center; B
a. nuclear membrane
b. nucleoplasm
c. nucleolus – makes ribosomes
d. chromosomes – genetic material; made of DNA
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4. Cell Wall – outer wall of plant; made of cellulose (fiber); P
5. Chloroplasts – site of photosynthesis; P
6. Amyloplasts – store starch (some P); Chromoplasts – store colored pigments
to help absorb energy – involved in colorful fall foliage
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7. Mitochondria – “powerhouse of the cell”; site of cell respiration; B
Rxn: C6H12O6 + O2 CO2 + H2O + energy
(stored as ATP)
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8. Endoplasmic reticulum (e.r.) – “transport system”; B
9. Ribosomes – proteins
made here; B
10. Golgi body – “Go-between”; packages & transports materials; B
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11. Lysosomes – digestive/”suicide sacs”; A
12. Vacuoles – storage sacs;
big in plants;B
13. Centrioles – involved
in cell division; A
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Structures of Cells – 5:11
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Plant vs. animal cells
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Plant vs. Animal Cells – 6:05
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D. Organization
1. animals:
Cells Tissues Organs Systems
2. plants:
Cells Tissues Tissue Systems Organs
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THE END!!